`text{đặt} x^2+x = a`
`=>(x^2+x)^2 + 3(x^2+x)+2=a^2+3a+2`
`=a^2+a+2a+2`
`=(a^2+a)+(2a+2)`
`=a(a+1)+2(a+1)`
`=(a+1)(a+2)`
`=(x^2+x+1)(x^2+x+2)`
~~~~~~~~GOOD LUCK~~~~~~~~~~
Giải:
`(x^2 + x)^2 + 3(x^2 + x) + 2`
`= (x^2 + x)^2 + (x^2 + x) + 2(x^2 + x) + 2`
`= (x^2 + x)(x^2 + x + 1) + 2(x^2 + x + 1)`
`= (x^2 + x + 1)(x^2 + x + 2)`
Viết CH e của 7N 20Ca 19K 18Ar 15P 16S 10 Ne
Giúp mình với, mình cảm ơn mọi người nhiều ạ
Giúp tớ bài 3 ạ 💦 tớ cảm ơn nha :3
Exercise 4: Put the verbs in the brackets in the correct tense, past simple or past continuous. Use the passive form if necessary. 1. When she heard the phone ring, she _______ (stop) reading to answer it. 2. My mother _______ (read), so she didn't see me walking past. 3. When the accident happened, thousands of people _______ (pass) through the airport. 4. I _______ (have) English lessons every week from the age of four onwards. 5. They decided to leave the beach because it _______ (get) dark and they wanted to get home while there was still some light. 6. Kate already _______ (think) of leaving university before she failed her first year exams? 7. Since your house had a pool, you _______ (swim) every day? 8. The disaster _______ (attract) hundreds of people from the country to the city. 9. Sorry I couldn't come on Monday, I _______ (work) on my project. 10. The national park _______ (create) to protect wildlife.
III.* Choose the best answer 1 ____________ she was tired, she finished knitting the scarf for her dad. A. In spite of B. Although C. Despite D. Because 2 Nowadays, they can produce silk of multiple colors __________ they can meet customers’ demands. A. so as to B. in order that C. despite D. though 3 After visiting Van Phuc village, they ____________to their hotel for lunch. A. came from B. came up C. came down D. came back 4.Mary doesn't get on with her two brothers. A. agree with B. hate C. please with D. have a friendly relationship with 5. He works as an ____________ in his uncle’s workshop. A. farmer B. artisan C. teacher D. doctor 6. She presented me with a new blanket on which she ____________ some flowers. A. knitted B. moulded C. carved D. embroidered 7. Lots of Vietnamese girls like wearing ____________ and Ao Dai. A. conical hats B. paintings C. lanterns D. handicraft 8.Bat Trang is one of the most famous ____________ craft villages in Ha Noi. A. tradition B. traditionalist C. traditional D. traditionally 9.Local people can ___________ their livings by providing tourists with necessary services. A. make B. earn C. find D. do 10.Trang: Let’ s go outside and look round the village. Hoa: “___________.” A. It’s a good idea B. Well done C. You’re welcome D. Here it is
Viết tập hợp A các số tự nhiên lớn hơn 8 và nhỏ hơn 14 bằng hai cách
Mọi người ơi giúp mình với mình cần vào sáng mai gấp lắm ạ
Mọi người ơi mấy câu reported speech Giúp mk với mk cảm ơn nhiều ❣❣ Mk hứa đánh giá 5 ⭐ nè
Vẽ mầm / chibi Nếu vẽ thêm mắt càng tốt vẽ thêm mắt dễ đc hay nhất Lưu ý mầm tradi , chibi digi Góp ý giúp tui vẽ mắt đuy Mn đừng để ý cái má nó nha
Có ban nhiêu hình tứ giác ạ giúp mik với
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